Here is a survivor TD where you must try to stay alive the longest. There are a total of 60 levels and each player has 10 lives. It requires 2-4 players.

The game is fun, and fairly popular. If you're hoping to beat it, you must ensure that the other players are good as well, as the game ends when the others are eliminated and only 1 player is left.

Basically, each player has a different corner of the map in which to build. Waves of creeps follow a mazed path, and must be eliminated by your towers before they reach the end. Various towers can be built and upgraded. Gameplay is simple, and this one is easy to learn.

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Download:
Greatest Orc Mazer TD Final 143kb

To save, right-click on the above link, and choose "Save As". Browse to your maps directory and save there (usually C:\Program Files\Warcraft III\Maps\Download).